Varistor Products
Thermally Protected Varistors > TCMOV Series
RoHS
TCMOV Varistor Series
Description
The LittelfuseTCMOV is a thermally self protected device. It
consists of a 34mm varistor with an integral thermal disconnect
system designed to open in the event of overheating due to
abnormal over-voltage conditions, outlined in UL 1449. TheTCMOV
helps facilitate SPD module compliance to UL1449 for type 1 and
type 2 applications.
The device integrates a micro-switch which is triggered by a
mechanical structure that makes the indicator circuit isolated from
the main power. If the device disconnects from the system power
the switch will change status. These features simplify the design
and save cost for the customer.
TheTCMOV devices offer quick thermal response due to the close
proximity of the integrated thermal element to central section of
the MOV body. This configuration also offers lower inductance
than most discreet solutions resulting in improved clamping
performance to fast over-voltage transients.
Agency Approvals
Agency
Agency File Number
Features
•ꢀ Maximumꢀsingleꢀsurgeꢀ
capability up to 50kA,
8/20 waveshape.
•ꢀ Designedꢀtoꢀfacilitateꢀ
compliance to UL1449
forType 1 andType 2
SPD application.
E320116
•ꢀ NominalꢀDischargeꢀ
Current Value: 20kA.
•ꢀ SCCR:ꢀ200kA
•ꢀ Integratedꢀmicro-switchꢀ
for indication
•ꢀ -45°Cꢀtoꢀ+75°Cꢀoperatingꢀ
temperature.
•ꢀ RecognizedꢀtoꢀULꢀ
1449 3rd edition.
1.ꢀꢀcURꢀandꢀURꢀapprovedꢀforꢀTypeꢀ2ꢀSPDꢀApplication
2.ꢀꢀURꢀapprovedꢀforꢀTypeꢀ1ꢀSPDꢀApplication
circuitry/design.
•ꢀ RoHSꢀcompliant.
Applications
•ꢀ SPDꢀapplications
•ꢀ AC/DCꢀpowerꢀ
•ꢀ Telecommunicationꢀ
systems
distribution systems
•ꢀ Highꢀvoltageꢀ
power supplies
•ꢀ PLCꢀApplications
•ꢀ PowerꢀTransferꢀSwitch
•ꢀ Inverter
•ꢀ ꢀPhotovoltaicꢀsystemsꢀꢀ
•ꢀ ꢀWindꢀpowerꢀsystems
•ꢀ UPS
Absolute Maximum Ratings
TCMOV Series
Units
Continous:
•ꢀForꢀratingsꢀofꢀindividualꢀmembersꢀofꢀaꢀseries,ꢀseeꢀDeviceꢀRatingsꢀandꢀSpecificationsꢀchart
Steady State Applied Voltage:
ꢀ
DCꢀVoltageꢀRangeꢀ(VM(DC))
ACꢀVoltageꢀRangeꢀ(VM(AC)RMS
150ꢀtoꢀ700
V
V
ꢀ
)
115 to 550
Transient:
ꢀ
ꢀ
Non-RepetitiveꢀSurgeꢀCurrent,ꢀ8/20µsꢀWaveformꢀ(ITM
)
up to 50,000
280 to 960
-45ꢀtoꢀ+75
-45ꢀtoꢀ+85
< 0.01%
2500
A
J
Non-RepetitiveꢀEnergyꢀCapability,ꢀ2msꢀWaveformꢀ(WTM
)
OperatingꢀAmbientꢀTemperatureꢀRangeꢀ(TA)
StorageꢀTemperatureꢀRangeꢀ(TSTG
°C
°C
°C
V
)
TemperatureꢀCoefficientꢀ(αV)ꢀofꢀClampingꢀVoltageꢀ(VC)ꢀatꢀSpecifiedꢀTestꢀCurrent
Hi-PotꢀEncapsulationꢀ(IsolationꢀVoltageꢀCapability)
IsolationꢀVoltageꢀCapabilityꢀ(whenꢀtheꢀthermalꢀdisconnectꢀopens)
HousingꢀInsulationꢀResistance
1500
V
>1,000
MΩ
Contact your Littelfuse product representative for additional information.
CAUTION:ꢀStressesꢀaboveꢀthoseꢀlistedꢀinꢀ“AbsoluteꢀMaximumꢀRatings”ꢀmayꢀcauseꢀpermanentꢀdamageꢀtoꢀtheꢀdevice.ꢀThisꢀisꢀaꢀstressꢀonlyꢀratingꢀandꢀoperationꢀ
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tcmov34s.html for current information.
231
TCMOVVaristor Series
Revised: January 16, 2014